Activating tunnels using control packets
US8279752B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 27, 2007 |
| Grant date | Oct 2, 2012 |
| Priority date | — |
| Expiry date | Aug 2, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L12/4633
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Packet switch operating methods and packet switches detect, at a packet switch, a change in a first tunnel's ability to relay packets between the packet switch and another packet switch and, in response, send a control packet to the other packet switch. The control packet indicates a particular one of the tunnels is active on the packet switch. The packet switches are coupled together by the first tunnel and a second tunnel. A packet switch network includes a first packet switch and a second packet switch both configured to recognize disagreement regarding which one of a first tunnel and a second tunnel is active and which one is inactive in response to receiving control packets from each other and resolve the disagreement so that a particular one of the first tunnel and the second tunnel is active according to both the first packet switch and the second packet switch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.